Longtime Slashdot reader williamyf writes: FireFox 153 was released today. The most important user-facing changes are improvements to PDF handling (you can now merge PDFs and add images to them), and HDR video playback (on Windows, provided HDR is active systemwide). Other under-the-hood changes include browser-wide containers and QWAC support. The full list is in the change notes.

But the most important feature is that this version is an ESR and, therefore, defines the ESR feature set for the next year. Why is being an ESR so important, you ask?

1.) ESR, rather than "normal" (a.k.a. Rapid Release), Firefox is the out-of-the-box browser for many important distros, including Debian, RHEL,...